Are the biblical stories of angels in the Old Testament being witnessed today? Are UFOs messengers from God? Chris Bledsoe, a deeply religious family man and successful business owner from North Carolina was on the verge of the unthinkable after losing everything in the 2007 financial crisis and suffering from a debilitating chronic disease. Fishing along the banks of the Cape Fear River with three co-workers and his teenage son, he walks away from the group and cries out to God in a desperate prayer for help.

What is the nature of unidentified aerial phenomena? Forty years ago a small cadre of dedicated researchers began actively investigating cases, interviewing witnesses, and exchanging data through a small, informal network of international contacts. Today this low-profile network, or "invisible college", has grown into a larger, multination volunteer research effort joined by many individuals. But the questions first raised 40 years ago remain current - and unanswered. 

In this absorbing and frequently contentious book, Roger Penrose puts forward his view that there are some facets of human thinking that can never be emulated by a machine. The book's central concern is what philosophers call the "mind-body problem". Penrose examines what physics and mathematics can tell us about how the mind works, what they can't, and what we need to know to understand the physical processes of consciousness.

The discovery of the quantum - the idea, born in the early 1900s in a remote corner of physics, that energy comes in finite packets instead of infinitely divisible quantities - planted a rich set of metaphors in the popular imagination. Quantum imagery and language now bombard us like an endless stream of photons. Phrases such as multiverse, quantum leap, alternate universe, the uncertainty principle, and Schrödinger's cat get reinvented continually in cartoons and movies, coffee mugs and T-shirts, and fiction and philosophy.

The Buddhist saint Nāgārjuna, who lived in South India in approximately the second century CE, is undoubtedly the most important, influential, and widely studied Mahāyāna Buddhist philosopher. His greatest philosophical work, the Mūlamadhyamikakārikā - read and studied by philosophers in all major Buddhist schools of Tibet, China, Japan, and Korea - is one of the most influential works in the history of Indian philosophy. Now, in The Fundamental Wisdom of the Middle Way, Jay L. Garfield provides a clear translation of Nāgārjuna's seminal work.